Help with 21-23

21. On the dartboard, it is equally probable that a dart thrown will land in any of the regions on the board. Assume that the regions are all of equal area or dimensions. If a dart land on the border line, disregard and throw the dart again. If a dart is thrown 3 times, what is the probability that it will land on a Red and then a Green and then a yellow? YELLOW RED RED YELLOW YELLOW BLUE RED RED BLUE BLUE YELLOW RED a. 0.01239 b. 0.7129 c. 0.2917 d. 0.0347 22. Two playing cards are drawn at random (without replacement) from a standard pack of 52 cards. What is the probability that the fistst card is red and the second card is black? a. 0.2549 b. 0.00037 c. 0.0385 d. 0.00479 23. A coin is tossed 3 times, what is the probability of getting 2 H and 1T or two T and 1 H, tha is P(H H T ) OR P( T T H)? Hint: The events are independent. a. 0.50 b. 0.33 c. 0. 75 d. 0 .66 red #1 vellow # 2 red # 3 yellow # 4 red # 5 red # 6 yellow #7 red # 8 yellow # 9 red # 10